I tend to just use FolderSync myself. To avoid battery issues, I have a schedule for most folders; but my DCIM/Pictures folders sync immediately upon changes. I then have a widget on my homepage that triggers a ‘sync all’. Anytime I need files synced immediately, it’s easy enough to click that button.
Something with the power of dockge should be behind a seprate form of authentication imo.
I only access it via VPN, it’s not exposed to WAN.